SEC Form 4
Onto Innovation Inc. (ONTO) insider trading
In the 12 months to Oct 23, 2026, 2 ONTO insiders reported open-market sales of $902.3K across 2 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $902.3K
- 2 filings · 2 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 2 of 2
- All $902.3K sold was pre-arranged
Who traded ONTO, and when
- Sale
- Sale, pre-arranged (10b5-1)
ONTO daily close from Oct 23, 2025 to Oct 23, 2026, between $124.09 and $378.45, last $198.29. 2 sale and 0 purchase filings by 2 insiders, marked at their filing dates. David Brian Miller, Director: sold $600.0K across 1 filing, first filed Oct 1, 2026, last Oct 1, 2026. Susan D. Lynch, Director: sold $302.3K across 1 filing, first filed Aug 25, 2026, last Aug 25, 2026.
Largest mark · tap a row for others
David Brian Miller · Director
Sale $600,000
2,000 shares at $300.00 avg
Filed Oct 1, 2026 · traded Sep 29
Pre-arranged (10b5-1) · close on filing date $314.88
David Brian Miller · Director
Director
$600.0K soldSusan D. Lynch · Director
Director
$302.3K soldHas Onto Innovation Inc.'s CEO sold stock?
No. Michael P. Plisinski (CEO) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
2 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| David Brian Miller | Director | $600.0K | — | 1 | 100% of sales | |
| Susan D. Lynch | Director | $302.3K | — | 1 | 100% of sales |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | David Brian Miller Director | SalePre-arranged (10b5-1) | 2,000 | $300.00 | $600.0K | 10,692 | |
traded | Susan D. Lynch Director | SalePre-arranged (10b5-1) | 1,000 | $302.30 | $302.3K | 2,684 |
GET /stocks/filings/vX/form-4?tickers=ONTO&filing_date.gte=2025-10-23&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"ONTO"
],
"issuer_cik": "0000704532",
"owner_cik": "0001233488",
"accession_number": "0001233488-26-000007",
"form_type": "4",
"filing_date": "2026-10-01",
"period_of_report": "2026-09-29",
"issuer_name": "ONTO INNOVATION INC.",
"issuer_trading_symbol": "ONTO",
"owner_name": "MILLER DAVID BRIAN",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-09-29",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 2000,
"transaction_price_per_share": 300,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 10692,
"transaction_value": 600000,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The stock sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 11, 2026"
}
]
},
{
"tickers": [
"ONTO"
],
"issuer_cik": "0000704532",
"owner_cik": "0001784973",
"accession_number": "0001784973-26-000007",
"form_type": "4",
"filing_date": "2026-08-25",
"period_of_report": "2026-08-21",
"issuer_name": "ONTO INNOVATION INC.",
"issuer_trading_symbol": "ONTO",
"owner_name": "Lynch Susan D",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-08-21",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 1000,
"transaction_price_per_share": 302.3,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 2684,
"transaction_value": 302300,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The stock sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 22, 2026."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 38 records
- Option exercises5 records
- Tax withholding20 records
- Grants and awards12 records
- Gifts1 record
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for ONTO every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.